Extrusion & Post
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LDPE Stretch Wrap Film
Fenómeno del problema
Stretch wrap film breaks after stretching, has insufficient self-adhesion, and the packaging is loose
Análisis de la causa
Stretch wrap film requires a balance between stretch ratio and self-adhesion; blending LDPE with LLDPE obtains tensile strength; the self-adhesive layer formulation and thickness affect the wrapping effect; when troubleshooting on site, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
Solución
① Optimize stretch performance with LDPE/LLDPE blending; ② design the self-adhesive layer formulation according to wrapping requirements; ③ finalize by stretch ratio testing; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
Conclusión clave
Stretch wrap film is fine work of formulation design; the blending ratio and self-adhesive layer determine the use performance; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
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